Jigsaw



FIG. 1 is a front perspective view of the present new design for a jigsaw;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines showing various features of a jigsaw are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a jigsaw, as shown and described. 